{
    "action": "tool_call",
    "reasoning": "I've already checked the three largest tables (columns_catalog, job_logs, llm_calls) for exact duplicates and found none. Now I need to check the remaining significant tables. I'll start with column_tags and tag_lineage_edges (the 4th and 5th largest tables), then check a few more to give a comprehensive answer about duplicates across the dataset.",
    "tool": "inspect_columns",
    "args": {
        "table": "column_tags"
    }
}